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CVE-2026-110249

8.6 high SSVC exploitation: none Published
NVD · CVE.org

A malicious, compromised, or MITM-controlled Exchange server can return a single well-formed SOAP response containing an element with enough attributes to keep Thunderbird's main thread CPU-bound for seconds to hours. This vulnerability was fixed in Thunderbird 158 and Thunderbird 153.5.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 4

  1. StatusAwaiting Analysis → PublishedNVD modified 2026-10-20 17:02
  2. CwesCWE-400NVD modified 2026-10-20 18:17
  3. CVSS8.6 (v3.1, CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H)NVD modified 2026-10-20 18:17
  4. First seenunscoredNVD modified 2026-10-13 19:30

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 3